Bridgeport Township STP - Wastewater Treatment Plant in Bridgeport Charter Township, Michigan

Bridgeport Township STP is a municipal wastewater treatment facility located in Bridgeport Charter Township, Saginaw County, Michigan. The plant serves a population of about 14,190 people, classifying it as a medium-sized agglomeration under US EPA guidelines. It is situated in the Saginaw River basin, which ultimately drains into Saginaw Bay and Lake Huron. As a US facility, the plant operates under the National Pollutant Discharge Elimination System (NPDES) permit program, administered by the Michigan Department of Environment, Great Lakes, and Energy (EGLE). For a plant of this scale, secondary treatment is typically required, with possible additional nutrient removal to protect the Great Lakes ecosystem. The plant's discharge enters the Saginaw River system, which flows into Saginaw Bay, a shallow, nutrient-rich embayment of Lake Huron. This watershed supports diverse aquatic life and is an important spawning and nursery area for fish species such as walleye and yellow perch. The bay is also a critical stopover for migratory waterfowl along the Mississippi Flyway.

The plant discharges into the Saginaw River watershed, which flows into Saginaw Bay and then Lake Huron, part of the Great Lakes system. This area is ecologically sensitive due to nutrient loading concerns, which can contribute to algal blooms in the bay. The watershed supports a mix of urban, agricultural, and industrial land uses, making effective wastewater treatment essential for maintaining water quality and aquatic habitat.